Error message : variable _mi_miss not found

[Cristina Fernandez-Garcia]

Hello I am working with a wide data set and trying to apply multiple imputation methods to missing data. I am running the code as follows:

mi set wide
mi register imputed util_6weeks util_12weeks util_18weeks util_24weeks util_38weeks util_52weeks

However, I can progress any further as I keep getting the following message: variable _mi_miss not found

Not sure what's going on as I have run this code successfully in the past... Can anyone help? I am using Stata version 18

Many thanks

[Carlo Lazzaro]

Cristina:
welcome to this forum.
You may find the following (quite old) Stata thread useful (variable _mi_miss not found - Statalist).

[Cristina Fernandez-Garcia]

Fantastic Carlo, thank you very much!!! It turns out I had to use the "mi unset, asis" command as it included some previously inputed data